subject: Introduce The Main Material Of Concrete Brick Machine [print this page] At present, the production of concrete brick machine based mainly on the use of raw materials for the cement and ordinary sand, artificial light aggregate (such as expanded perlite ceramic materials, clay pottery ceramic material and fly ash material), natural aggregates (such as pumice, volcanic slag and zeolite), industrial waste lightweight aggregate (such as fly ash, cinder, coal spontaneous combustion, coke slag, expanded slag slag and calcium beads) and other light coarse aggregate.
1. cement: The more than 32.5 ordinary portland cement, portland cement (GB175-1999) and Portland Slag Cement (GB1596-91), generally used when the summer production of slag cement. Should not be used pozzolana cement and fly ash cement.
SiO2 content of ash at all levels greater than 40%, Al2O3 content of more than 15%, bulk density of 516 ~ 107kg/m3, particle density 1800 ~ 2400kg/m3. In general, should use calcium, dry fly ash, which Gray and for more than 13MPa strength grade blocks, which can only be used for fly ash intensity level of the block is not greater than 10MPa .
Second, carbide: carbide is the power stone (CaC2) Preparation of waste generated when acetylene. Carbide slag and hydrated lime in the composition and nature of similar, Ca (OH) 2 content normally 60% -80% (dry basis). Wet process system in China to take more than acetylene, carbide high water content, concentrated by precipitation can be used. Carbide hair color blue, a slight odor, but harmless. If there is no alternative to carbide can be used fresh lime, generally do not use hydrated lime, caustic lime if necessary to pre-grinding, fineness 0.080mm square mesh sieve is not more than 25% margin. Requirements effective quicklime calcium oxide content is not less than 70%, the higher the better, if less CaO content can increase the lime content. Lime in the MgO content
